TX Driver Post-Cursor Control

Versal ACAP GTM Transceivers Architecture Manual (AM017)

Document ID

AM017

Release Date

2022-04-27

Revision

1.0 English

Driver swing can be controlled through CH*_TXPOSTCURSOR[5:0]. The default is user specified. All values listed below are in dB and are typical values.

Table 1. Transmitter Post-Cursor TX Pre-Emphasis Control
[5:0]	Emphasis (dB)	\|Coefficient Units\|
6'b0000000	0.00	0
6'b0000001	–0.20	1
6'b0000010	–0.41	2
6'b0000011	–0.63	3
6'b0000100	–0.85	4
6'b0000101	–1.07	5
6'b0000110	–1.31	6
6'b0000111	–1.54	7
6'b0001000	–1.78	8
6'b0001001	–2.04	9
6'b0001010	–2.30	10
6'b0001011	–2.57	11
6'b0001100	–2.84	12
6'b0001101	–3.13	13
6'b0001110	–3.42	14
6'b0001111	–3.72	15
6'b0010000	–4.04	16
6'b0010001	–4.37	17
6'b0010010	–4.71	18
6'b0010011	–5.07	19
6'b0010100	–5.43	20
6'b0010101	–5.82	21
6'b0010110	–6.22	22
6'b0010111	–6.64	23
6'b0011000	–7.09	24
6'b0011001	–7.56	25
6'b0011010	–8.06	26
6'b0011011	–8.59	27
6'b0011100	–9.15	28
6'b0011101	–9.75	29
6'b0011110	–10.39	30
6'b0011111	–11.09	31
6'b0100000	–11.84	32
6'b0100001	–12.67	33
6'b0100010	–13.58	34
6'b0100011	–14.61	35
6'b0100100	–15.77	36
6'b0100101	–17.11	37
6'b0100110	–18.69	38
The above values are defined when CH_TXPRECURSOR = `6'b00000`, CH_TXPRECURSOR2 = `6'b00000`, and CH*_TXPRECURSOR3 = `6'b00000` Emphasis = 20log10(V_high/V_low) = \|20log10(V_low/V_high)\|